In Generation V only, due to a glitch, if Gravity is used while two Pokémon are in the semi-invulnerable state of Sky Drop, Gravity will bring the user of Sky Drop down, but the target of Sky Drop will be stuck unable to move in the semi-invulnerable state until the effect of Gravity ends, the user of Sky Drop switches out or is knocked out, or the Pokémon affected by Sky Drop is knocked out. This can only occur in Double and Triple Battles. In later Generations, both user and the target are properly brought down.

Description

Changes the dungeon floor's status to Gravity. A floor under the influence of Gravity makes Flying-type Pokémon weak to Ground-type moves. Also, those with the Levitate ability lose immunity from Ground-type moves.

In the manga

In the Pokémon Adventures manga

Probopass narrows its eyes and the cap on the top of its head lowers slightly. Multiple black circles of energy come out of the center of its nose and travel outwards. Then, all airborne objects are drawn down to the ground until the cap on Probopass's head raises once again.